n=4的一些解
..2...2...0...2...1...2...0...1...0...2...0...1.0...2...0...1...0...2...0...2...2
..1..0..1..0..2....1..0..1..0..1....2..1..0..2..0....2..0..2..1..0
..0..1..0..1..0....2..1..2..1..2....0..2..1..0..2....0..1..0..2..1
..1..2..1..2..1....0..2..1..0..1....1..0..2..1..0....1..0..2..0..2
..1..0..2..0..2....1..0..2..1..0....2..1..0..2..1....0..1..0..1..0
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